Fire alarm



FIG. 1 is a top front perspective view of a fire alarm embodying our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof, the bottom being unadorned and forming no part of the claimed design;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a side view thereof, as seen from the right-hand side of FIG. 4; and,

FIG. 7 is a side view thereof, as seen from the left-hand side of FIG. 4. 

CLAIM The ornamental design for a fire alarm, as shown and described. 